I have a powersmith 20w LED work light that uses a 7.4v lithium battery pack made from 4x 18650 batteries. The charger is 120vac (I don’t know what the charger steps the power down to) and I want to convert it to charge from one of the 5v 2amp ports in my car so I don’t have to charge it in the house (I forget to grab it for work) I would also like to integrate a smart charge controller into it
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